@ARTICLE {AMUSA:1993, title = {Extraction of a phytotoxic substance from Colletotrichum gloeosporioides infected yam leaves}, author = {Amusa, N. A. and Ikotun, T. * and Asiedu, R. }, journal = {International Journal of Tropical Plant Diseases}, year = {1993}, volume = {2}, number = {2}, pages = {207--211}, note = {RTB; Root and Tuber; Yam}, }